22750309 has 2 divisors, whose sum is σ = 22750310. Its totient is φ = 22750308.

The previous prime is 22750307. The next prime is 22750313. The reversal of 22750309 is 90305722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21068100 + 1682209 = 4590^2 + 1297^2 .

It is a cyclic number.

It is not a de Polignac number, because 22750309 - 2¹ = 22750307 is a prime.

Together with 22750307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22750307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11375154 + 11375155.

It is an arithmetic number, because the mean of its divisors is an integer number (11375155).

Almost surely, 2^22750309 is an apocalyptic number.

It is an amenable number.

22750309 is a deficient number, since it is larger than the sum of its proper divisors (1).

22750309 is an equidigital number, since it uses as much as digits as its factorization.

22750309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 22750309 is about 4769.7283989762. The cubic root of 22750309 is about 283.3538382700.

The spelling of 22750309 in words is "twenty-two million, seven hundred fifty thousand, three hundred nine".